Sony has started rolling Android 4.2 Jelly Bean update for its flagship smartphones Xperia Z1 and Xperia Z Ultra. Sony noted in a blog post that these updates were prepared after the feedback they received from users and these updates addresses improvements to few under the hood features. The update includes performance and stability tweaks and improvements as well.
According to Sony the update fixes the display for better viewing experiences, and also includes a fix that gives longer battery life among other things. Below is the change log for the device updates.